My friends and I were just talking about this. In the workplace, it's a seemingly lose-lose situation for women when dealing with men because if a woman does not assert herself, she is an easy target to be taken advantage of (e.g., lower pay, more work, etc.), but if she does assert herself, she risks being perceived as a bitch.
While this is obviously a generalization, I do think women have to be much more careful about how they conduct themselves in the workplace, especially when in positions of power.